It was on the 16th anniversary of the 9-11 terrorist attack, as it happens, that the Government Accountability Office posted its reply to a request by six members of Congress to review the Transportation Security Commission’s aviation security measures.
The GAO was none too happy with what it found. In particular, it faulted the TSA for failing to set up a coherent system to analyze the cost and effectiveness of its various counterterrorism measures—many of them quite expensive. And it was specifically critical of TSA’s inability to evaluate the degree to which its layers of security deter attacks.
The following day, Elsevier published a book Mark Stewart and I have written, titled Are We Safe Enough? Measuring and Assessing Aviation Security. Among other things, the book tries (successfully, we think) to do exactly what the GAO asked for. A free Google preview of portions of the book is available at the publisher’s website, and further information about the book is posted here.
The TSA, says GAO, has put together a (secret) tool called RTSPA (you don’t want to know what that stands for) to analyze the effectiveness of its security layers. However, the tool only applies to a subset of the layers and is, according to GAO, “resource intensive.”